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BS ISO 24638:2021

BS ISO 24638:2021

$167.15

Space systems. Pressure components and pressure system integration

Published By Publication Date Number of Pages
BSI 2021 38
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This document establishes the baseline requirements for the design, fabrication and testing of space flight pressure components. It also establishes the requirements for the assembly, installation, test, inspection, operation and maintenance of the pressure systems in spacecraft and launch vehicles. These requirements, when implemented on a particular space system, ensure a high level of confidence in achieving safe and reliable operation.

This document applies to all pressure components other than pressure vessels and pressurized structures in a pressure system. It covers lines, fittings, valves, bellows, hoses and other appropriate components that are integrated to form a pressure system.

The requirements for pressure vessels and pressurized structures are set forth in ISO 14623.

This document does not apply to engine components.

PDF Catalog

PDF Pages PDF Title
2 National foreword
8 Foreword
9 Introduction
11 1 Scope
2 Normative references
3 Terms and definitions
15 4 Abbreviated terms
5 General requirements
5.1 General
16 5.2 Design requirements
5.2.1 Loads, pressures and environments
5.2.2 Strength
5.2.3 Stiffness
17 5.2.4 Thermal effects
5.2.5 Stress analysis
5.2.6 Fatigue analysis/damage tolerance (safe-life) analysis
5.2.7 Analysis of survivability against space debris and meteoroid impacts
5.2.8 Avoidance of accidental break-up caused by an on-board source of energy
18 5.3 Material requirements
5.3.1 Metallic materials
5.3.2 Non-metallic material requirements
5.4 Fabrication and process requirements
19 5.5 Contamination control and cleanliness requirements
5.5.1 General contamination control requirements
5.5.2 Design considerations
20 5.6 Quality assurance programme requirements
5.6.1 General
5.6.2 QA programme inspection plan requirements
5.6.3 QA inspection technique requirements
5.6.4 QA inspection data requirements
5.6.5 Acceptance test requirements
21 5.7 Qualification test requirements
5.8 Operation and maintenance requirements
5.8.1 Operating procedure
5.8.2 Safe operating limits
22 5.8.3 Inspection and maintenance
5.8.4 Repair and refurbishment
5.8.5 Storage
5.8.6 Documentation
23 5.8.7 Reactivation
5.8.8 Recertification
6 General pressurized-system requirements
6.1 System analysis requirements
6.1.1 System pressure analysis
6.1.2 System functional analysis
24 6.1.3 System hazard analysis
6.2 Design features
6.2.1 Assembly
6.2.2 Routing
6.2.3 Separation
6.2.4 Shielding
25 6.2.5 Grounding
6.2.6 Handling
6.2.7 Special tools
6.2.8 Test points
6.2.9 Common-plug test connectors
6.2.10 Individual test connectors
6.2.11 Threaded parts
6.2.12 Friction-type locking devices
6.2.13 Internally threaded bosses
6.2.14 Retainer or snap rings
6.2.15 Snubbers
26 6.3 Component selection
6.3.1 Connections
6.3.2 Fluid temperature
6.3.3 Actuator pressure rating
6.3.4 Pressure rating
6.3.5 Pump selection
6.3.6 Fracture and leakage
6.3.7 Oxygen system components
6.3.8 Pressure regulators
6.3.9 Manual valves and regulators
27 6.4 Design pressures
6.4.1 Overpressure or underpressure
6.4.2 Back-pressure
6.4.3 Pressure isolation
6.4.4 Gas/fluid separation
6.4.5 Compressed-gas bleeding
6.5 Mechanical-environment design
6.5.1 Acceleration and shock loads
6.5.2 Torque loads
6.5.3 Vibration loads
6.6 Controls
6.6.1 Interlocks
28 6.6.2 Multiple safety-critical functions
6.6.3 Critical flows and pressures
6.7 Protection
6.8 Electrical
6.8.1 Hazardous atmospheres
6.8.2 Radio frequency energy
6.8.3 Grounding
6.8.4 Solenoids
6.8.5 Electric motor-driven pumps
6.9 Pressure relief
6.9.1 General requirements
29 6.9.2 Flow capacity
6.9.3 Sizing
6.9.4 Unmanned flight vehicle servicing
6.9.5 Automatic relief
6.9.6 Venting
6.9.7 Relief valve isolation
6.9.8 Negative-pressure protection
30 6.9.9 Reservoir pressure relief
6.9.10 Air pressure control
6.10 Control devices
6.10.1 Directional control valves
6.10.2 Overtravel
6.10.3 Pressure and volume control stops
6.10.4 Manually operated levers
6.11 Accumulators
6.11.1 Accumulator design
31 6.11.2 Accumulator gas pressure gauges
6.11.3 Accumulator identification
6.12 Flexible hose
6.12.1 Installation
6.12.2 Restraining devices
6.12.3 Flexible hose stress
6.12.4 Temporary installations
7 Specific pressure system requirements
7.1 General
32 7.2 Hydraulic systems
7.2.1 Hydraulic system components
33 7.2.2 Pressure limit
7.2.3 Cavitations
7.2.4 Hydraulic lockup
7.2.5 Pressure relief
34 7.3 Pneumatic-system requirements
7.3.1 Pneumatic-system components
7.3.2 Controls
35 Annex A (informative) Recommended minimum safety factors
36 Annex B (informative) Open line force calculation factors
37 Bibliography

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BS ISO 24638:2021
$167.15